Home / 28,430.76-39,231.30-16,491.78

Finding the Fourth Proportional to 28,430.76, 39,231.30 and 16,491.78

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Solution

The fourth proportional to 28,430.76, 39,231.30 and 16,491.78 is: 22,756.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,430.76 : 39,231.30 = 16,491.78 : x
  2. Step 2: Convert to fraction form
    28,430.76/39,231.30 = 16,491.78/x
  3. Step 3: Cross multiply
    28,430.76x = 39,231.30 × 16,491.78
  4. Step 4: Simplify right side
    28,430.76x = 646,993,968.71
  5. Step 5: Solve for x
    x = 646,993,968.71/28,430.76
  6. Step 6: Final answer
    x = 22,756.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.